Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications12 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | NNU4180 | |
| Bore diameter | d | 400 mm |
| Outside diameter | D | 650 mm |
| Width | B | 250 mm |
| Basic dynamic load rating | C | 4850 kN |
| Basic static load rating | C0 | 9600 kN |
| Fatigue load limit | Pu | 900 kN |
| Mass | ≈m | 321.85 kg |
| Precision class | PN — Normal (ISO 492:2023) | |
| Cage | M — Brass Cage | |
| Minimum operating temperature | Tmin | -30 °C |
| Maximum operating temperature | Tmax | 150 °C |
Product characteristics3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Cage | M | Brass Cage |
| Tolerance class | PN | Normal (ISO 492:2023) |
| Number of rows | 2 | Double-row design |
Main Dimensions & Performance Data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 400 mm15.748 in |
| Outside diameter | D | 650 mm25.591 in |
| Width | B | 250 mm9.843 in |
| Basic dynamic load rating, radial | Cr | 4,850,000 N1,090,377.698 lbf |
| Basic static load rating, radial | C0r | 9,600,000 N2,158,273.381 lbf |
| Fatigue load limit, radial | Cur | 900,000 N202,338.129 lbf |
| Limiting speed for grease lubrication | nG Grease | 1,280 1/min |
| Limiting speed for oil lubrication | nG Oil | 1,510 1/min |
| Mass | ≈m | 321.85 kg709.557 lbs |
Mounting dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter shaft shoulder | da | 426 mm16.772 in |
| Diameter of housing shoulder | Da | 624 mm24.567 in |
| Maximum recess radius | ra1 max | 5 mm0.197 in |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum chamfer dimension | r1 min | 6 mm0.236 in |
| Raceway diameter inner ring | F | 463 mm18.228 in |
| Axial displacement | s | 11.4 mm0.449 in |
| Shoulder diameter outer ring | D1 | 577 mm22.717 in |
Temperature range2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C-22 °F |
| Operating temperature max. | Tmax | 150 °C302 °F |
Capabilities & suitability1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Largebearing | Yes |
Manufacturer Identity5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Schaeffler Product Code | 374588 | |
| Brand | FAG | |
| Base Type | NNU4180 | |
| SAP material number | 0390456840030 | |
| Base product | 2305090141 |
Product Identity1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Short Description | Cylindrical roller bearing |
Technical Data17 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore Diameter (D) | 400 mm | |
| Outside Diamater (D) | 650 mm | |
| Total Width (B) | 250 mm | |
| Basic Dynamic Load Rating, Radial (Cr) | 4,850,000 N | |
| Basic Static Load Rating, Radial (C0R) | 9,600,000 N | |
| Raceway Diameter Inner Ring (F) | 463 mm | |
| Operating Temperature Min. (Tmin) | -30 °C | |
| Limiting Speed For Grease Lubrication (Ng Grea) | 1,280 1/min | |
| Minimum Diameter Shaft Shoulder (Da) | 426 mm | |
| Limiting Speed (Ng Oil) | 1,510 1/min | |
| Operating Temperature Max. (Tmax) | 150 °C | |
| Maximum Diameter Of Housing Shoulder (Da) | 624 mm | |
| Minimum Chamfer Dimension (R1 Min) | 6 mm | |
| Shoulder Diameter Outer Ring (D1) | 577 mm | |
| Axial Displacement (S) | 11.4 mm | |
| Maximum Recess Radius (Ra1 Max) | 5 mm | |
| Fatigue Load Limit, Radial (Cur) | 900,000 N |